Impact of agricultural practice on the Sr isotopic composition of food products: Application to discriminate the geographic origin of olives and olive oil

Técher, Isabelle; Medini, Salim; Janin, Myriam; Arregui, M.

doi:10.1016/j.apgeochem.2017.05.010

Cited by 23 publications

(14 citation statements)

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“…The 87 Sr/ 86 Sr isotope composition of plants reflects the strontium isotopic ratios of the underlying bedrock, as biologic processes involved during plant growth do not entail isotopic fractionation of strontium isotopes [ 37 – 38 ]. Other factors affecting strontium ratios in plants include a significant contribution of rainfall water [ 39 ] atmospheric pollution and the use of modern fertilizers [ 40 – 44 ].…”

Section: Introductionmentioning

confidence: 99%

Shipping amphorae and shipping sheep? Livestock mobility in the north-east Iberian peninsula during the Iron Age based on strontium isotopic analyses of sheep and goat tooth enamel

et al. 2018

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Animal mobility is a common strategy to overcome scarcity of food and the related over-grazing of pastures. It is also essential to reduce the inbreeding rate of animal populations, which is known to have a negative impact on fertility and productivity. The present paper shows the geographic range of sheep provisioning in different phases of occupation at the Iron Age site of Turó de la Font de la Canya (7th to 3rd centuries BC). Strontium isotope ratios from 34 archaeological sheep and goat enamel, two archaeological bones and 14 modern tree leaves are presented. The isotopic results suggest that sheep and goats consumed at the site were reared locally (within a few kilometres radius) during the whole period of occupation. The paper discusses the isotopic results in light of the socio-political structure of this period, as complex, strongly territorial societies developed during the Iron Age in the north-east Iberian Peninsula.

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Section: Introductionmentioning

confidence: 99%

Shipping amphorae and shipping sheep? Livestock mobility in the north-east Iberian peninsula during the Iron Age based on strontium isotopic analyses of sheep and goat tooth enamel

et al. 2018

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“…Each one of these systems has its limits and a multicomponent approach is often required. Among these methods, the analysis of stable Sr isotopes is particularly interesting, and has already been used to control some labels such as AOP or AOC on many agricultural products such as olive oil (Janin et al, 2014;Medini et al, 2015;Portarena et al, 2017;Techer et al, 2017), fruit juice (Rummel et al, 2010), coffee (Rodrigues et al, 2009;Techer et al, 2011), wine (Almeida and Vasconcelos, 2001;Barbaste et al, 2002;Durante et al, 2018;Epova et al, 2019;Lancelot et al, 1999;Vinciguerra et al, 2016) or crops (Choi et al, 2008;Kawasaki et al, 2002;Oda et al, 2002;Song et al, 2014;Voerkelius et al, 2010). The method is based on the biogeological cycle of Sr and the specificity of each growing environment in terms of the 87 Sr/ 86 Sr isotopic ratio: Sr-cycling in terrestrial plants is well documented and strontium is considered to be taken up principally from the soil (exchangeable phase), which allows the use of the 87 Sr/ 86 Sr ratio as a tracer of the geographical origin of a plant crop (Åberg et al, 1990;Capo et al, 1998;Graustein, 1989;Stewart et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

“…It is commonly accepted that the 87 Sr/ 86 Sr signature in a plant does not undergo significant fractionation during extraction and translocation (Graustein, 1989). Hence, the measured Sr isotopic ratio reflects mixing in the natural or aquaculture environments (Techer et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, the plant substrates, amendments and fertilizers used are specific to each producer. Under these conditions, it would appear possible to distinguish the geographical origin of aquatic plants using the 87 Sr/ 86 Sr tracer because of different geological and hydrogeological media and also the specific aquaculture practices (Techer et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Sr isotope discrimination of multi species aquaculture productions at a worldwide scale and contribution of the water reservoir in Sr plant input

Delattre

Técher

Reneaud

et al. 2020

Heliyon

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Aquatic plants commonly used in landscaping or as ornaments are subject to a growing worldwide market that is source of trade between countries which can induce the transfer of unwanted invasive alien plant species. To protect national biodiversity and economy, authorities promote the use of local markets without however providing the method to do so. This study deals with the feasibility of using Sr stable isotopes for discriminating the origin of aquatic plants at a worldwide scale. More than 15 aquatic plant species were collected from main producers in four countries (China, Hungary, Germany, France). Each plant was analysed for its 87 Sr/ 86 Sr ratio and the results are compared within samples from each producer and between countries. For a given produce, significant 87 Sr/ 86 Sr can be measured as a function of the plant species. However, at the scale of Europe, plants from different producers are almost isotopically identical with 87 Sr/ 86 Sr ratios of 0.71228 AE 218.10 À5 , 0.71116 AE 178.10 À5 and 0.71066 AE 156.10 À5 for France, Hungary and Germany, respectively. These values are clearly distinguishable from those measured in Chinese aquatic plants, which yield a mean 87 Sr/ 86 Sr ratio of 0.70591 AE 168.10 À5 . This Sr isotopic discrimination between European and Chinese aquatic plants is explained by the specific agricultural and hydrogeological environments of the producing countries. Indeed, the cycle of Sr in aquatic plants is studied here for the first time. Natural and anthropic materials of French origin were collected and characterized in terms of 87 Sr/ 86 Sr. Mixing models reveal that irrigation water is the main source of Sr for plants (35-85%). Clays from the substrate (4-38%) and fertilizers (5-19%) can also contribute, in proportions depending on the plant species. This model accounts for the small variations in 87 Sr/ 86 Sr ratios of species from the same producer and allows a discrimination between producers using different agricultural practices.

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“…Despite superb sensitivity and effectiveness, elemental analysis, especially stable isotope analysis, requires highly sophisticated and expensive instruments such as inductively coupled plasma-mass spectrometry (13,14), which is not accessible to most laboratories, and the operation and maintenance cost is significant. As an attractive alternative, pollen analysis provides a very affordable choice for revealing a sample's geographic origin.…”

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confidence: 99%

Identifying Counterfeit Cigarettes Using Environmental Pollen Analysis: An Improved Procedure*

Chan

Robinson

Liu³

et al. 2020

Journal of Forensic Sciences

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Traditional pollen preparation techniques provide clear residues for pollen identification; however, such methods are time-consuming, requiring repeated centrifugation, heating, and digestion with high-concentration hazardous chemicals. Tobacco leaves can effectively trap environmental pollen due to hairy surface and terpene-rich exudates. A new tobacco sample processing method was developed by using different extraction chemistry with surfactant. Marlboro Gold cigarettes were employed as model samples for method development. Parameters critical for pollen extraction, which include number of cigarette sticks used, extraction solution, and extraction temperature, were optimized. By using 1% dishwashing detergent to treat three cigarettes at room temperature, the improved method was able to recover sufficient pollen for microscopic analysis in three repeated centrifuge-washing steps and omit hazardous chemicals involved in traditional methods. We focused on the pollen of common ragweed (Ambrosia artemisiifolia), a plant native to North America, as an indicator to differentiate genuine and counterfeit U.S. brand cigarettes. Results from analyzing randomly purchased genuine (authenticated by forensic examination) and known counterfeit Marlboro Gold provided by law enforcement revealed that a significant amount (39%) of Ambrosia were consistently present in all genuine samples, while counterfeit contained none or only trace count. Similar results were found in other counterfeit U.S. brand cigarettes (all seized in the U.S.) involved in this study as well. Lack of Ambrosia in cigarette strongly indicates the product was not originated in the United States.

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Impact of agricultural practice on the Sr isotopic composition of food products: Application to discriminate the geographic origin of olives and olive oil

Cited by 23 publications

References 52 publications

Shipping amphorae and shipping sheep? Livestock mobility in the north-east Iberian peninsula during the Iron Age based on strontium isotopic analyses of sheep and goat tooth enamel

Shipping amphorae and shipping sheep? Livestock mobility in the north-east Iberian peninsula during the Iron Age based on strontium isotopic analyses of sheep and goat tooth enamel

Sr isotope discrimination of multi species aquaculture productions at a worldwide scale and contribution of the water reservoir in Sr plant input

Identifying Counterfeit Cigarettes Using Environmental Pollen Analysis: An Improved Procedure*

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